Been turning wrenches for 55 years... absolutely do NOT use compression fittings on a vehicle. They work (sort of) in a house because the house (usually) doesn't move or vibrate. If used on a vehicle which vibrates, they will leak. Every time.
Or just make one. It's not hard... For my Graziano SAG12, piece of 1.5 inch thick mystery aluminum I found in the shop (it cut like 6061.) Some half-inch bolts
with bearing bronze caps pressed onto the ends. Works just fine...
I recommend that you look at the bearing manufacturer's engineering manuals. Timken and SKF both have extensive manuals online. All of the testing has already been done and the info is in the manuals.
I have a SAG12 which I bought about 10 years ago. Paid $3000 for it but it had been used only for cutting nylon and was carefully maintained. Also came with a good 3-jaw, a drawer full of soft jaws and a well-made collet closer. I really like it; good lathe.
Absolutely do NOT buy this lathe...
Edit: be wary of the the cheap Chinese DRO's. I have one on my Bridgeport and it actually works quite well. But I can't read the manual... the words are English but the sentence structure is not. :D
That shop looks like he never makes anything, just spends all day polishing his machines. Wow! Seriously, how does he control the mess? Flying chips, coolant, and cutting oils? Or does he just cut everything dry?
Amazing shop. I'm a bit jealous...
Nope, it's true if you live in a humid climate (like Houston.) A small unit will run for a longer time than a large unit, thereby removing more moisture from the air. The large unit will come on, quickly lower the temperature inside the house and then shut off, but it won't run long enough to...
FAA certified A&P mechanic with Inspection Authorization here...
My head just exploded. You're going to fix a metric bolt/hole on a French (metric) airplane with an inch-sized tap/drill? Please... don't.
I know of no polite way to say this, but your description of metric thread pitch as "tpi"...